TYPO3 Core

If an extension has no 'depends' section in ext_emconf.php, but requires packages via composer.json, then during install:generatepackagestates an error is raised:

The package "myext" depends on "my/composer-package" which is not present in the system.

When putting 'constraints' => ['depends' => []], into ext_emconf.php it works fine.

Especially for project specific local extensions you may not have any dependencies specified. When it works with the empty depends array, it should also be possible to leave it out entirely.